4443440740421 has 2 divisors, whose sum is σ = 4443440740422. Its totient is φ = 4443440740420.

The previous prime is 4443440740331. The next prime is 4443440740441. The reversal of 4443440740421 is 1240470443444.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2624354640196 + 1819086100225 = 1619986^2 + 1348735^2 .

It is a cyclic number.

It is not a de Polignac number, because 4443440740421 - 2³⁴ = 4426260871237 is a prime.

It is a super-2 number, since 2×4443440740421² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4443440740441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2221720370210 + 2221720370211.

It is an arithmetic number, because the mean of its divisors is an integer number (2221720370211).

Almost surely, 2^{4443440740421} is an apocalyptic number.

It is an amenable number.

4443440740421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4443440740421 is an equidigital number, since it uses as much as digits as its factorization.

4443440740421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 688128, while the sum is 41.

The spelling of 4443440740421 in words is "four trillion, four hundred forty-three billion, four hundred forty million, seven hundred forty thousand, four hundred twenty-one".